First Coast Crime Stoppers said Monday an anonymous donation bumped its reward to $15,000. The rest of the bounty is from the Justice Coalition, a Jacksonville nonprofit that advocates for victims of violent crimes.

Authorities have received more than 2,400 tips in Somer's case, but have made no arrests.

Investigators have not named any suspects or people of interest. The Clay County Sheriff's Office hasn't said whether it believes the crime was committed by more than one person.

Somer's body was found 50 miles from her home, in a Georgia landfill where trash from her neighborhood was dumped.